6 papers
FUSE spectroscopy of sdOB primary of the post common-envelope binary LB 3459 (AA Dor)
Johannes Fleig, Thomas Rauch, Klaus Werner +1
LB 3459 (AA Dor) is an eclipsing, close, post common-envelope binary consisting of an sdOB primary star and an unseen secondary with an extraordinarly low mass - formally a brown d…
Non-LTE Spectral Analysis of Extremely Hot Post-AGB Stars: Constraints for Evolutionary Theory
Thomas Rauch, Klaus Werner, Marc Ziegler +2
Spectral analysis by means of Non-LTE model-atmosphere techniques has arrived at a high level of sophistication: fully line-blanketed model atmospheres which consider opacities of…
O(He) Stars
T. Rauch, E. Reiff, K. Werner +1
Spectral analyses of H-deficient post-AGB stars have shown that a small group of four extremely hot objects exists which have almost pure He absorption-line spectra in the optical.…
FUV Spectroscopy of the sdOB Primary of the Eclipsing Binary System AA Dor
Johannes Fleig, Thomas Rauch, Klaus Werner +1
AA Dor is an eclipsing, close, post common-envelope binary (PCEB). We present a detailed spectral analysis of its sdOB primary star based on observations obtained with the Far Ultr…
Spectral evolution of non-thermal electron distributions in intense radiation fields
K. Manolakou, D. Horns, J. G. Kirk
(abridged) Models of many astrophysical gamma-ray sources assume they contain a homogeneous distribution of electrons that are injected as a power-law in energy and evolve by inter…
Analysis of the dust evolution in the circumstellar disks of TTauri stars
A. Schegerer, S. Wolf, N. V. Voshchinnikov +2
We present a compositional analysis of 8-13um spectra of 32 young stellar objects (YSOs). Our sample consists of 5 intermediate-mass stars and 27 low-mass stars. While the spectra…